Some oil-filled capacitors manufactured by MARCON ELECTRONICS CO., LTD. (Futai Chikudennki CO., LTD, Tokyo Denki CO., LTD.) of Nippon Chemi-Con Group used PCBs as insulating oil. We stopped using PCBs in July 1972, and therefore, PCBs are not used as insulating oil for capacitors manufactured after August 1972.

Electrolytic Capacitors and PCB

Electrolyte used for electrolytic capacitors is conductive liquid, and therefore, PCBs are not used in principle because of its insulating properties. Electrolytic capacitors manufactured by Nippon Chemi-Con Corporation and MARCON ELECTRONICS CO., LTD. do not use PCBs regardless of manufacturing year.